function search_selection(){
	var selections = {
		"信息科学学部":[
			"国际软件学院","计算机学院","遥感信息工程学院","电子信息学院","测绘学院","印刷与包装系" 
		],
		"理学部":[
			"数学与统计学院","物理科学与技术学院","化学与分子科学学院","生命科学学院","资源与环境科学学院"
		],
		"工学部":[
			"水利水电学院","电气工程学院","动力与机械学院","城市设计学院","土木建筑工程学院" 
		],
		"医学部":[
			"基础医学院","口腔医学院","公共卫生学院","HOPE护理学院","药学院","第一临床学院","第二临床学院","医学职业技术学院"
		],
		"人文科学学部":[
			"文学院","历史学院","哲学学院","外国语言文学学院","新闻与传播学院","艺术学系"
		],
		"社会科学学部":[
			"信息管理学院","经济与管理学院","法学院","马克思主义学院","政治与公共管理学院","教育科学学院","WTO学院","社会学系"
		]
	};
	
	function update_department(selected){
		var departments = selections[selected];
		$("select[name='department']").html("");
		for(var i = 0; i<departments.length;i++){
			$("select[name='department']").append("<option value='"+departments[i]+"'>"+departments[i]+"</option>");
		}
	}
	
	
	for(var i in selections){
		$("select[name='faculty']").append("<option value='"+i+"'>"+i+"</option>");
	}
	$("select[name='faculty']").change(function(){
		update_department($("select[name='faculty']").val());
	});
	update_department($("select[name='faculty']").val());
	
}